<template>
  <div class='login_container'>
    <div class='login_box'>
       //头像区域
      <div class='avatar_box'>
        <img src='https://img0.baidu.com/it/u=3176115403,3761025672&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=200' alt=''>
      </div>
      <!-- 登入表单区域 -->
      <el-form ref="LoginFormRef" :model="LoginForm" :rules="LoginFormRules" label-width="0px" class='login_from'>
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="LoginForm.username" prefix-icon="el-icon-user"> </el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="LoginForm.password" prefix-icon="el-icon-s-goods" type="password"> </el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
export default {
  name: "login",
  data(){
    return{
      //登入表单绑定的数据
      LoginForm:{
        username: "admin",
        password: "123456",
      },
      //这是表单的验证规则对象
      LoginFormRules:{
        //验证用户名是否合法
        username:[
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        //验证密码是否合法
        password:[
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    //点击重置按钮，重置登入表单
    resetLoginForm(){
      this.$refs.LoginFormRef.resetFields();
    },
    //表单登录预验证
    login(){
      this.$refs.LoginFormRef.validate(async valid=>{
        if(!valid) return;
        const {data:res}=await this.$http.post('login',this.LoginForm);
        if(res.meta.status!=200) return this.$message.console.error("登入失败！");
        this.$message.success("登入成功");
        //1.将登录成功之后的token，保存到客户端的sessionStorage中；
        //1.1项目中出了登录之外的其他API接口，必须在登录之后才能访问
        //1.2token只应在当前网络打开期间生效，所以将token保存在sessionStorage中
        window.sessionStorage.setItem("token",res.data.token)
//2.通过编程导航跳转到后台主页,路由地址是 /home
        this.$router.push("/home");
        console.log(res);

      });
    }
  }
};

</script>

<style lang="less"scoped>
.login_container {
  background-color:#5b6e81;
  height: 100%;
}
.login_box{
  width:550px;
  height:370px;
  background-color:#fff;
  border-radius:3px;
  position: absolute;
  left:50px;
  top:50%;
  transform: translate(100%,-50%);
}
.avatar_box{
  height:130px;
  width:130px;
  border:3px solid #eee;
  border-radius:50%;
  padding:10px;
  box-shadow: 0 0 10px #ddd;
  position:absolute;
  left:50%;
  transform:translate(-50%, -50%);
  background-color: #fff;
  img{
    width: 100%;
    height: 100%;
    border-radius:50%;
    background-color: #eee;
  }
}
.login_from{
  position: absolute;
  bottom:0;
  width: 100%;
  padding:0 10px;
  box-sizing: border-box;

}
.btns{
  display:flex;
  justify-content:flex-end;

}
</style>n